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Does anyone know some cheap LoRa radios I can buy? I'd like to play with it, but so far I only know about the LoPy (expensive but easy to program) and some no-name radios for which sample code is very hard to come by.

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At the end of the readme I point out the boards I use, namely the adafruit Lora feather which was the best bang for buck Arduino compatible board, and the Lora/GPS header for raspi which I would not necessarily recommend anymore, but that I can say works with this code.

Oh I missed that, thanks. My local Hackerspace made some boards that have that LoRa radio and an ESP8266 on them, I might grab some of those as I'm not in the US and Adafruit won't ship here cheaply, thank you.

Yeah, that's probably a good bet. I'm in Europe and there are actually a decent number of European suppliers (or try Mouser, they seems to ship internationally for free, I have no idea how it works out for them but I got mine there).

If you're looking for something Arduino-compatible, you should consider the RFM9x family of boards, based on the SX1276 LoRa chips.

Breakout board from Adafruit: https://www.adafruit.com/product/3072

Ahh, those are the boards I couldn't find sample code for, thanks! Adafruit is a godsend.

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